In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
fbdev: clear fb_info->mode before deleting a videomode<\/p>\n
fb_set_var() can delete a mode from info->modelist when userspace
\npasses FB_ACTIVATE_INV_MODE through FBIOPUT_VSCREENINFO. The code
\nchecks that the mode being deleted is not the current info->var and
\nthat fbcon is not using it, but it does not check fb_info->mode.<\/p>\n
fb_info->mode may still point into the modelist entry being deleted.
\nIf the entry is freed, later mode sysfs reads through show_mode() can
\ndereference a stale pointer.<\/p>\n
Clear fb_info->mode before calling fb_delete_videomode() when it
\nmatches the mode being removed.<\/p>\n","protected":false},"excerpt":{"rendered":"
In the Linux kernel, the following vulnerability has been resolved:<\/p>\n
fbdev: clear fb_info->mode before deleting a videomode<\/p>\n
fb_set_var() can delete a mode from info->modelist when userspace
\npasses FB<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-11976","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/11976","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=11976"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=11976"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=11976"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}